Doorknob lock



Patented July 12, 193g UNITED STATES PATENT OFFICE DOORKNOB LOCK Fred E. Schneider, Grand Junction, Colo. Application September 6, 1935, Serial No. 39,466

3 Claims.

This invention relates to door knob locks, and

Yhas for its principal object the pro-duction of a simple and efficient door knob lock, certain parts of which may be moved into and out of clutching engagement with the roll-back of the conventional door lock whereby the latching bolt of the door lock may be actuated.

A further object of this invention is the production of a door knob lock, having a conventional key operated barrel lock carried by one knob for selectively moving certain parts of the door knob lock into clutching engagement with the roll-back of a conventional door lock whereby the latching bolt of the door lock may be moved.

Another object of this invention is the production of a simple and eicient door knob lock which may be actuated manually without a key from the inside of the door, and which may be operated through the insertion of a key in a barrel lock carried by the knob from the outside of the door.

Other objects and advantages of the present invention will appear throughout the following speciiication and claims.

In the drawing:-

Figure 1 is a horizontal sectional view through a portion of the door showing the improved door knob lock partly in section;

Figure 2 is a section taken on line 2 -2 of Figure 1, the parts being shown in a released or free position;

Figure 3 is a section similar to Figure 2 showing the parts in a locking position in engagement with the roll-back;

Figure 4 is a transverse section taken on line 4-4 of Figure 2;

Figure 5 is a transverse section taken on line 5 5 of Figure 2;

Figure 6 is a transverse section taken on line 6 6 of Figure 2;

Figure 7 is a transverse section taken on the line I-'I of Figure 3;

Figure 8 is a perspective sectional View of the shank of the knob and the cooperating parts, a

'portion of the lock casing and roll-back being also shown;

Figure 9 is a perspective View of one of the sliding clutching plates;

Figure 10 is a longitudinal section through the barrel lock supporting casing showing a modied form of spiral groove and lug connection between the barrel lock and clutching plate.

By referring to the drawing it will be seen that D designates the door, which carries the usual or conventional lock casing L. This lock (Cl. 'l0-149) casing L also carries the conventional roll-back I0, which roll-back I is provided with a rectangular or square central aperture l I.

The squared stem or rectangular stem or shank I2 of the door knob carries at its respective en-ds 5 the knobs I3 and I4. The shank I2 is provided with an intermediate portion I which is reduced in thickness to allow the intermediate portion I5 to freely rotate within the squared aperture II of the roll-back IIJ when the parts are in the position shown in Figures 2 and 8.

A clutching plate I5 is slidably mounted through casing I1 carried within the knob Il! as shown in the drawing, and this clutching plate I6 is connected to a key actuated barrel lock I8 15 which is tted within the enlarged outer end I8 of the casing II, the outer end of the barrel lock I8 preferably being ilush with the outer end of the knob I4, as shown. A suitable key 2! of the conventional type may be utilized for actuating the barrel lock I8 which is also of the conventional type. The mechanism of the barrel lock I8 is connected to the clutching plate I 5 by means of an extending linger 2| shown in the drawing. This plate I6 may be longitudinally slotted, as 25 at 22, and a securing pin 23 extends through the shank of the knob Ill and through one of the selected apertures 24 of the stem or shank I2 thereby permitting the plate I6 to shift longitudinally and also to firmly secure the knob M, the casing I'I and the stem or shank I2 in position. The clutching plate I6 is provided with a pair of parallel right angularly extending ears 25 which straddle the intermediate reduced portion I5 of the stem or shank I2, note particularly 35 Figure 8. When the barrel lock I8 is unlocked through the medium of the key 20, the plate I5 will be shifted longitudinally to a position where the ears 25 will t snugly within the aperture I I of the roll-back I8, thereby causing the roll-back 40 I8 to be rotated when the knob Ell is rotated, and consequently, actuate the conventional latch bolt of the lock L. It is thought unnecessary to show the latching bolt of the lock L due to the fact that this is of a conventional type. The barrel lock I8 may be of the conventional spring type which will cause the plate I6 to be shifted inwardly when the lock I8 is actuated through the medium of the key 28, and when the key is moved to a locked position the plate i6 is adapted to be 5U drawn outwardly with respect to the roll-back I 0. Since the lock I8 is of the conventional type it is thought also unnecessary to illustrate the particular structure embodied in the lock I8 since any conventional lock of this type may be utilized.

The knob I3 is provided with a socket 26 into which fits the opposite end 21 of the stem or shank I2 and a manually operated clutching plate 28 is slidably mounted within the longitudinally extending aperture 29 formed in the knob I3. This clutching plate 28 may be provided with a laterally turned end 30, to facilitate the gripping of the plate 28 by one finger of the operator. This plate 28 may be longitudinally slotted, as at 3|, and a securing screw 32 is extended through the shank 33 of the knob I3 for connecting the end 2l of the stem I2 in engagement with the knob I3, this screw 32 also extending through the slot 3I and allowing the clutch plate 28 to be longitudinally adjusted. The plate 28 is provided with a pair of parallel right-angularly bent ears 34 similar to the ears 25, which ears straddle the reduced portion I5 of the stem or shank I2, as shown in Figure 8. By shifting the plate 28 inwardly the ears 34 may be forced into the aperture Il of the roll-back IB and causes the stem or shank I2 to be locked in engagement with the roll-back I0 whereby the roll-back I0 may be rotated when the knob I3 is rotated.

As shown in the drawing, it will be obvious that the barrel lock I8 which is carried by the knob I4 is preferably located on the outside of the door so that the clutching plate I6 may be only actuated and moved to an operative position through the insertion of the key 2U into the lock IS and by a proper manipulation of the key. However, the plate 28 may be manually operated by the fingers of the operator from the inside of the door thereby avoiding the necessity of utilizing a key to shift the plate 28 to and from an operative position or to a clutching position with respect to the roll-back ID.

As shown in Figure 10, the barrel lock I8a may be provided with a central bolt 2|a having a spiral groove 35 into which fits the lug 36 on the inner end of the clutching plate lea. This structure may form a connection for the clutching plate and barrel lock bolt and may be considered preferable to that illustrated in Figure 8.

Having described the invention what is claimed as new is:

1. A door knob lock of the class described coinprising a stem, a roll back having a rectangular passage formed therethrough, said stem having a reduced shank extending through the passage of said roll back and freely rotatable therein, the enlarged end portions of the stem defining shoulders at opposite sides of the end of the shank, a knob fitting about an end portion of said stem and connected with the stem to turn the stem with the knob, a clutching plate slidably mounted for movement longitudinally of the stem in said knob and having a portion extending along the shank and provided with side ears straddling the shank and disposed against opposite sides thereof and adapted to engage the shoulders to limit outward sliding movement of the clutch plate, said ears being adapted to move into the passage of said roll back and engage walls thereof to cause the roll back to turn with the stem when the clutching plate is slid longitudinally of the stem in one direction, and said clutching plate having a portion projecting from the outer end of said knob and bent to form a portion projecting laterally and constituting a finger-engaging element whereby the clutching plate may be pressed inwardly to shift the ears into the passage of the roll back.

2. A door knob lock of the class described comprising a stem, a roll back having a rectangular passage formed therethrough, said stem having a reduced shank extending through the passage of said roll back and freely rotatable therein, the enlarged end portions of the stern defining shoulders at opposite sides of the end of the shank, a knob tting' about an end portion of said stem and connected with the stem to` turn the stem with the knob, a clutching plate slidably mounted for movement longitudinally of the stem in said knob and having a portion extending along the shank and provided With side ears straddling the shank and disposed against opposite sides thereof and adapted to engage the shoulders to limit outward sliding movement of the clutch plate, said ears being adapted to move into the passage of said roll back and engage walls thereof to cause the roll back to turn with the stem when the clutching plate is slid longitudinally of the stem in one direction, a lug carried by the outer end of said clutching plate, and a barrel lock mounted in said knob and having a rotatable bolt formed with a spiral track receiving said lug and causing the clutching plate to be shifted longitudinally when the bolt is rotated.

3. A door knob lock of the class described comprising a roll back having a rectangular passage formed therethrough, a stem having its intermediate portion reduced in width to provide a flat sided shank connecting enlarged end portions providing shoulders at opposite sides of ends of the shank, the shank of the stem passing through the passage of said roll back and freely rotatable therein and of greater length than the passage of the roll back to dispose the shoulders in spaced relation to ends of the roll back, a knob formed with a pocket receiving the enlarged end portion of said stem, a clutching plate extending longitudinally of the stem against the enlarged portions thereof and having side ears straddling the shank of the stern and engaging opposed iiat faces thereof between the roll back and the shoulders and adapted to engage the shoulders and limit outward sliding movement of the clutch plate, said plate extending into the knob beyond the end of the stem and being formed with a longitudinally extending slot, a pin extending transversely through the knob and the enlarged end portion of the stem and passing through the slot to mount the plate for sliding movement and hold the knob in xed engagement with the stem, and means for imparting sliding adjustment to said plate and moving the ears thereof into the passage of the roll back for gripping engagement therewith to cause turning of the roll back with the stern and knob.

FRED E. SCHNEIDER. 

